A Single‐Ion Magnet Tape with Five‐Coordinate Cobalt(II) Centers
Dong Shao, Shruti Moorthy, Peng Peng, Wan‐Jie Tang, Le Shi, Z.-W. Wang, Xiao‐Qin Wei, Saurabh Kumar Singh
Abstract
Abstract A one‐dimensional (1D) coordination polymer [Co(btca) 1/2 (mbpy)] n ( 1 , mbpy =4,4′‐Dimethyl‐2,2′‐bipyridyl, H 4 btca =1,2,4,5‐Benzenetetracarboxylic acid) constructed by a mixed tetracarboxylic‐dipyridyl ligand strategy with a ribbon topology was synthesized and magnetically characterized. Magnetic studies combined with theoretical calculations reveal large easy‐axis magnetic anisotropy of the central Co(II) ions in a highly distorted five‐coordination geometry. Interestingly, field‐induced single‐ion magnet (SIM) behavior was evidenced in the chain compound, making the cobalt(II) coordination ribbon to be the first five‐coordinate SIM chain.